Revert of Change call-sites now that SkCanvas is not ref-counted

content/renderer/pepper/ppb_image_data_impl.cc

Index: content/renderer/pepper/ppb_image_data_impl.cc
diff --git a/content/renderer/pepper/ppb_image_data_impl.cc b/content/renderer/pepper/ppb_image_data_impl.cc
index edf80694df95c0059797b4b78a00a7f8c9526bcd..7b8740b1ebd31cd65879ea674fbc49c9d19dff1f 100644
--- a/content/renderer/pepper/ppb_image_data_impl.cc
+++ b/content/renderer/pepper/ppb_image_data_impl.cc
@@ -171,7 +171,8 @@
 void* ImageDataPlatformBackend::Map() {
   if (!mapped_canvas_) {
     const bool is_opaque = false;
-    mapped_canvas_ = dib_->GetPlatformCanvas(width_, height_, is_opaque);
+    mapped_canvas_ =
+        sk_sp<SkCanvas>(dib_->GetPlatformCanvas(width_, height_, is_opaque));
     if (!mapped_canvas_)
       return NULL;
   }
@@ -249,7 +250,7 @@
     skia_bitmap_.setPixels(shared_memory_->memory());
     // Our platform bitmaps are set to opaque by default, which we don't want.
     skia_bitmap_.setAlphaType(kPremul_SkAlphaType);
-    skia_canvas_ = base::MakeUnique<SkCanvas>(skia_bitmap_);
+    skia_canvas_ = sk_make_sp<SkCanvas>(skia_bitmap_);
     return skia_bitmap_.getAddr32(0, 0);
   }
   return shared_memory_->memory();